Q261
Open questionGrashhoff number is given by
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Chemical Engineering · all questionsHeat Transfer
Heat Transfer
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Q262
Open questionIn a shell and tube heat exchanger, square pitch compared to triangular pitch
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Q263
Open questionAir is best heated with steam in a heat exchanger of
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Q264
Open questionAn evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is
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Q265
Open questionUse of transverse baffles in a shell and tube heat exchanger is done to increase the
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Q266
Open questionHeat exchanger tubes are never made of
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Q267
Open questionWhich of the following has the minimum absorptivity?
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Q268
Open questionThe heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.
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Q269
Open questionThe driving potential for the crystal growth during crystallisation is the __________ of the solution.
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Q270
Open questionFor what value of Prandtl number, the Col-burn analogy is valid?
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Q271
Open questionIf air (a non-condensing gas) is present in a condensing vapor stream, it will __________ the condensation rate of vapor.
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Q272
Open questionIn forced circulation, the heating element is injected
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Q273
Open questionIn a heat exchanger, the rate of heat transfer from the hot fluid to the cold fluid
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Q274
Open questionThe heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16 m is 10 W/m2. The temperature of the inside wall is -5°C. The outside wall temperature is
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Q275
Open questionThe rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as
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Q276
Open questionThe radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m2. The flux, when the element temperature is increased to 1000°C for the same furnace temperature is
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Q277
Open questionPick out the wrong statement.
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Q278
Open questionRadiation energy is emitted by all the substances, which are above
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Q279
Open questionThe purpose of floating head in a heat exchanger is to
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Q280
Open questionExtremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the
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